"His friends are telling people it's over," a source tells the magazine. "They've been moving in different directions for a while," tells another source.

Perhaps most evident of their impending split was Dupri's absence at the Jackson family memorial. A close friend explained to the magazine that Dupri "doesn't attend funerals."

Friends have been speculating what caused the rift, with some suggesting the pair may have collaborated too often. Dupri produced several tracks on Jackson's last two albums, "Discipline" and "20 Y.O."

Others close to the couple suggest Jackson, 43, and Dupri, 36, were never really compatible.

"Jermaine likes to be out there, mingling with everybody and Janet's more shy," said an unnamed source.